Investment in Other Companies	12 Months Ended
Dec. 31, 2013
Investment in Other Companies
Investment in Other Companies	(7) Investment in Other Companies In September 2008, the Company entered into an agreement to acquire a 20% interest in Trip Linhas Aereas, a regional airline operating in Brazil ("TRIP"). As of December 31, 2013, the Company's investment balance in TRIP was $19.1 million. In connection with the investment in TRIP, the Company entered into a put option agreement with the majority shareholder of TRIP that allowed the Company to put its investment to TRIP's majority shareholder at an established price based on a 5% annual rate of return over the investment period. On July 12, 2012, the Company sold its interest in TRIP for a price of $42 million. The purchase price is scheduled to be paid in three installments over a two-year period and may be accelerated upon the occurrence of certain conditions identified in the purchase agreement. As part of the sale transaction, the Company also received an option to acquire 15.38% of the ownership in Trip Investimentos Ltda., the purchaser of the Company's TRIP shares ("Trip Investimentos"). The option has an initial exercise price per share equal to the price paid by Trip Investimentos to acquire the TRIP shares from the Company. The exercise price escalates annually at a specified rate and the Company can exercise the option, at its discretion, between the second and fourth anniversaries of the Company's receipt of the final required installment payments from Trip Investimentos. Under the terms of the agreement, Trip Investmentos is prohibited from transferring the TRIP shares until all three installment payments have been made. The restriction on Trip Investimentos' ability to transfer the TRIP shares prevents the transaction from being recognized as a sale for financial reporting purposes. As a result, the Company intends to account for the transaction as a sale once all three installment payments have been made. The Company has no continuing involvement with the TRIP shares. As of December 31, 2013, the Company had received the first two installment payments totaling $26.2 million. These payments were recorded as an "Other Long-Term Liability" on the Company's consolidated balance sheet. The third installment payment is due July 12, 2014 for an amount of $16.8 million. The last installment payment and the option to purchase 15.38% of Trip Investimentos represent variable interests in TRIP Investimentos, which is a variable interest entity. The Company has no equity interest and no control over Trip Investimentos, and therefore the Company does not consolidate the financial performance of Trip Investimentos in its financial statements. On September 29, 2010, the Company invested $7 million for a 30% ownership interest in Mekong Aviation Joint Stock Company, an airline operating in Vietnam ("Air Mekong"). During 2011, the Company invested an additional $3 million in Air Mekong. During the year ended December 31, 2013, the Company sold its shares of Air Mekong. In conjunction with the sale of its shares, the Company recognized a gain of $5.0 million, which is reflected in other income in the Consolidated Statements of Comprehensive Income. During the year ended December 31, 2013, the Company terminated its sub-lease with Air Mekong and recognized $5.1 million of other income primarily due to the recognition of contingent rent payments, net of the write-off of certain maintenance deposits. The contingent rent payments were collected and realized related to aircraft maintenance obligations and no are longer payable to Air Mekong as a result of the sub-lease termination.

(7) Investment in Other Companies

In September 2008, the Company entered into an agreement to acquire a 20% interest in Trip Linhas Aereas, a regional airline operating in Brazil ("TRIP"). As of December 31, 2013, the Company's investment balance in TRIP was $19.1 million. In connection with the investment in TRIP, the Company entered into a put option agreement with the majority shareholder of TRIP that allowed the Company to put its investment to TRIP's majority shareholder at an established price based on a 5% annual rate of return over the investment period.

On July 12, 2012, the Company sold its interest in TRIP for a price of $42 million. The purchase price is scheduled to be paid in three installments over a two-year period and may be accelerated upon the occurrence of certain conditions identified in the purchase agreement. As part of the sale transaction, the Company also received an option to acquire 15.38% of the ownership in Trip Investimentos Ltda., the purchaser of the Company's TRIP shares ("Trip Investimentos"). The option has an initial exercise price per share equal to the price paid by Trip Investimentos to acquire the TRIP shares from the Company. The exercise price escalates annually at a specified rate and the Company can exercise the option, at its discretion, between the second and fourth anniversaries of the Company's receipt of the final required installment payments from Trip Investimentos. Under the terms of the agreement, Trip Investmentos is prohibited from transferring the TRIP shares until all three installment payments have been made. The restriction on Trip Investimentos' ability to transfer the TRIP shares prevents the transaction from being recognized as a sale for financial reporting purposes. As a result, the Company intends to account for the transaction as a sale once all three installment payments have been made. The Company has no continuing involvement with the TRIP shares. As of December 31, 2013, the Company had received the first two installment payments totaling $26.2 million. These payments were recorded as an "Other Long-Term Liability" on the Company's consolidated balance sheet. The third installment payment is due July 12, 2014 for an amount of $16.8 million. The last installment payment and the option to purchase 15.38% of Trip Investimentos represent variable interests in TRIP Investimentos, which is a variable interest entity. The Company has no equity interest and no control over Trip Investimentos, and therefore the Company does not consolidate the financial performance of Trip Investimentos in its financial statements.

On September 29, 2010, the Company invested $7 million for a 30% ownership interest in Mekong Aviation Joint Stock Company, an airline operating in Vietnam ("Air Mekong"). During 2011, the Company invested an additional $3 million in Air Mekong. During the year ended December 31, 2013, the Company sold its shares of Air Mekong. In conjunction with the sale of its shares, the Company recognized a gain of $5.0 million, which is reflected in other income in the Consolidated Statements of Comprehensive Income.

During the year ended December 31, 2013, the Company terminated its sub-lease with Air Mekong and recognized $5.1 million of other income primarily due to the recognition of contingent rent payments, net of the write-off of certain maintenance deposits. The contingent rent payments were collected and realized related to aircraft maintenance obligations and no are longer payable to Air Mekong as a result of the sub-lease termination.